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Watch it decide · Ledger #273

daily-brief · MarketData+BriefComposer

published· conf ▰▰▰▰▱ 0.89· AUG 17, 2026, 9:00 PM· anthropic/claude-haiku-4.5· constitution v5

01

Inputs — what it was given

{}
02

Sources read — 5 cited

03

The gate — deterministic verdict

Decision: published · computed in 18800 ms

5/5 series, all sourced and fresh.

04

Outputs — what it produced

{
  "gate": {
    "pass": true,
    "reason": "5/5 series, all sourced and fresh.",
    "confidence": 0.89
  },
  "market": {
    "sources": [
      {
        "url": "https://fred.stlouisfed.org/series/MORTGAGE30US",
        "asOf": "2026-08-13",
        "name": "FRED · 30-Year Fixed Mortgage",
        "value": 6.67,
        "seriesId": "MORTGAGE30US"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS10",
        "asOf": "2026-08-14",
        "name": "FRED · 10-Year Treasury",
        "value": 4.68,
        "seriesId": "DGS10"
      },
      {
        "url": "https://fred.stlouisfed.org/series/DGS2",
        "asOf": "2026-08-14",
        "name": "FRED · 2-Year Treasury",
        "value": 4.17,
        "seriesId": "DGS2"
      },
      {
        "url": "https://fred.stlouisfed.org/series/FEDFUNDS",
        "asOf": "2026-07-01",
        "name": "FRED · Fed Funds Rate",
        "value": 3.63,
        "seriesId": "FEDFUNDS"
      },
      {
        "url": "https://fred.stlouisfed.org/series/SP500",
        "asOf": "2026-08-14",
        "name": "FRED · S&P 500",
        "value": 7785.76,
        "seriesId": "SP500"
      }
    ],
    "readings": [
      {
        "asOf": "2026-08-13",
        "unit": "percent",
        "label": "30-Year Fixed Mortgage",
        "value": 6.67,
        "prevAsOf": "2026-08-06",
        "seriesId": "MORTGAGE30US",
        "prevValue": 6.69
      },
      {
        "asOf": "2026-08-14",
        "unit": "percent",
        "label": "10-Year Treasury",
        "value": 4.68,
        "prevAsOf": "2026-08-13",
        "seriesId": "DGS10",
        "prevValue": 4.63
      },
      {
        "asOf": "2026-08-14",
        "unit": "percent",
        "label": "2-Year Treasury",
        "value": 4.17,
        "prevAsOf": "2026-08-13",
        "seriesId": "DGS2",
        "prevValue": 4.15
      },
      {
        "asOf": "2026-07-01",
        "unit": "percent",
        "label": "Fed Funds Rate",
        "value": 3.63,
        "prevAsOf": "2026-06-01",
        "seriesId": "FEDFUNDS",
        "prevValue": 3.63
      },
      {
        "asOf": "2026-08-14",
        "unit": "index",
        "label": "S&P 500",
        "value": 7785.76,
        "prevAsOf": "2026-08-13",
        "seriesId": "SP500",
        "prevValue": 7798.99
      }
    ]
  },
  "briefId": 135,
  "composed": {
    "spec": {
      "root": {
        "kind": "Stack",
        "children": [
          {
            "cols": 3,
            "kind": "Grid",
            "children": [
              {
                "kind": "Stat",
                "label": "30-Year Fixed Mortgage",
                "value": "6.67%",
                "caption": "30-year fixed mortgage at 6.67%, down 2 bps today, still anchored above historical averages."
              },
              {
                "kind": "Stat",
                "label": "10-Year Treasury",
                "value": "4.68%",
                "caption": "10-year Treasury rose 5 bps to 4.68%, tracking a slight pullback in long-end safety demand."
              },
              {
                "kind": "Stat",
                "label": "2-Year Treasury",
                "value": "4.17%",
                "caption": "2-year Treasury up 2 bps to 4.17%, keeping near-term policy expectations stable."
              },
              {
                "kind": "Stat",
                "label": "Fed Funds Rate",
                "value": "3.63%",
                "caption": "Fed funds rate unchanged at 3.63%, no new signals from the policy rate."
              },
              {
                "kind": "Stat",
                "label": "S&P 500",
                "value": "7,785.76",
                "caption": "S&P 500 at 7,785.76, reflecting modest equity stability alongside modest Treasury moves."
              }
            ]
          },
          {
            "kind": "Text",
            "text": "What it means for your shop",
            "emphasis": "mono"
          },
          {
            "kind": "Callout",
            "text": "With the 30-year fixed now at 6.67% and the 10–2 spread locked at 51 basis points, the yield curve remains compressed but mortgage originators have a marginal rate relief to pass through; the 199 basis point mortgage–Treasury spread offers no outsized incentive for refi, keeping purchase-focused volumes under pressure.",
            "tone": "info"
          }
        ]
      },
      "title": "markets & rates"
    },
    "label": "autonomous · AI-generated",
    "usage": {
      "promptTokens": 1992,
      "completionTokens": 341
    },
    "summary": "The 10-year pushed higher by 5 basis points while the 30-year fixed fell 2 basis points, leaving the 10–2 curve still shallow at 51 basis points.",
    "headline": "Mortgage rates slip as Treasury long-end catches up to near-term tightness",
    "disclaimer": "Not financial advice. Generated autonomously from public Federal Reserve data."
  },
  "artifactId": 137
}
05

Proof — the hash-chained record

seq #273
row_hash 7d69fa9ac2f5c28c6e581f7f0a4882111bd600611b45da894a40126287b7fcfe
prev_hash cfea95367a5be8f8f1dddcfbff850bf63f51eecbffc62a93ac6ec831ec4f6ca0

This exact row, with its canonical preimage, is public at /api/ledger/export. Recompute its hash with the standalone verifier — it shares no code with this site. The chain head is timestamped into Bitcoin.

Evidence or it doesn't ship.